Efficient construction of graphite long-range ordered structure in ultra-high molecular weight polyethylene matrix via continuous solid-state extrusion

作者：Liu, Zengquan; Feng, Yanhong; Jiang, Jinhui; Zhang, Yunhao; Sun, Hang; Chen, Tao; Yin, Xiaochun^*

来源：COMPOSITES COMMUNICATIONS, 2022, 34: 101258.

DOI：10.1016/j.coco.2022.101258

• Polymer composites
• Continuous solid-state extrusion
• 3D thermal conductive network
• Thermal interface materials

In the present work, with a unique eccentric rotor solid extruder, ultra-high molecular weight polyethylene/ natural graphite (UHMWPE/NG) oriented composites were fabricated by establishing a three-dimensional (3D) oriented segregated thermal conductive network at 120 degrees C, the temperature of the softening state of UHMWPE matrix. The as-prepared composites exhibited high thermal conductivity (6.76 W.m- 1K-1) and low surface resistivity (0.152 omega cm) at 29.4 vol% NG loading, making them possess the tremendous development potential and prospects for electronic packaging applications. The research provided an efficient and green as well as low-cost method for manufacturing high-performance thermal interface materials (TIMs).